$ git clone -n https://src.fedoraproject.org/rpms/R-bindrcpp.git /var/lib/mock/f40-build-2155808-50918/root/chroot_tmpdir/scmroot/R-bindrcpp
Cloning into '/var/lib/mock/f40-build-2155808-50918/root/chroot_tmpdir/scmroot/R-bindrcpp'...
$ git fetch origin 75dc0e9e78e81190a77357872b0453bdb3efcf9b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-bindrcpp
 * [new ref]         75dc0e9e78e81190a77357872b0453bdb3efcf9b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 75dc0e9 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild